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United States Patent | 6,097,915 |
Fleck ,   et al. | August 1, 2000 |
In an electrostatographic imaging apparatus employing at least one charging device, scorotron which consists of one or more fine wires supported on insulated blocks spaced between the photoconductive surface and a conductive or insulative surface parallel to it. A screen or grid is interposed between the corona wires and the photoconductive surface and the grid is maintained at a potential roughly equal to the potential desired on the photoconductive surface. The scorotrons geometry, the individual wires are from 1/2 to 11/2 inches apart and are spaced from the grid by about 3/4 of an inch. Field enhancement electrode(s) are placed on the screen and are biased at the same potential as the screen. The field enhancement electrode(s) enhance electrical performance.
Inventors: | Fleck; Thomas J. (Webster, NY); Pietrowski; Kenneth W. (Penfield, NY); Song; Jing qing (Webster, NY) |
Assignee: | Xerox Corporation (Stamford, CT) |
Appl. No.: | 311870 |
Filed: | May 14, 1999 |
Current U.S. Class: | 399/171; 250/324; 361/230 |
Intern'l Class: | G03G 015/02 |
Field of Search: | 399/171,172,170,311,50 250/324,325,326 361/225,230 |
4285025 | Aug., 1981 | Nishikawa | 361/230. |
5613172 | Mar., 1997 | Pietrowski et al. | 250/324. |
5655186 | Aug., 1997 | Godlove et al. | 399/171. |